Elevator-door latch



March 15, 1927.` Y l1,621,391

W. A. WILLIAMS ELEVATOR DOOR LATCH Fned sept. 26, 192s 9 2 o o n al f '9 20V 8 B 0, i9, n www ,E

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3 WILLIAM A :WILLIAMS Y @l-IiofL/vwq Y .i slight capacity Jfor lateral motion of the usual controller in the elevator car. The

Patented Mar. 15, 1927. i i: d 'Y ,y 'il UNITED: STATES PiAsriaxjrrA orifice.- y

Virrirrnrrpiwr A. WILLIAMS, or concursos, orr'xo. arriveren-Doon Laren.

Application filed September 26, l1923. Serial No. 684,852

This invention relates more particularly to .The cover 8 et the circuit closer box is pro-V elevators in which electricity-is employed asv vided with means for' normally locking it inv the motive power and the obj ect oi the invenl its closed position consisting oi a bent finger f tion is to provide improved means for pre 2O having aixed thereto a hinging pin V21 60 venting the opening of the door until the journalled along the 'uppercorner o @the car has arrived opposite the door orby perbox said bent finger 420 having a locking'endl sons voutside the car and 'for preventing 20a adapted to reach under base plate `22 I the starting of the car from such ga position at the under side of the cover when the latter g i' until4 the Vdoor is closed. f is'in closed position. The hingingpin 21 is 65 10 The invention is embodied in the example equipped with a spring 23 adapted to press herein shown and described, the features oi' the said bent finger toward the said locking `novelty being. finally claimed. position. The hinging "in 21 is also pro-- In the accompanying drawingvided with an arm 4t) a jfustably secured at` Figure 1 illustrates in elevation the comone end thereto, said arm being provided 720 bined door latch and circuit closer, said with an antiriction roller 25 at its upper parts being in the latched and circuit closn l y Y f .ing position. f f f The elevator or ear is equipped with a Fig. 2 is a similar view showing the door shoe or cam V26y hinged by two links/.27 to a latch disengaged and the circuit closer in the bracket l28 secured vto the car, said links per-` 75 open position of the parts. mitting a lateral swinging movement ointhe Fig. 3 is a vertical sectional view on a cam into and out of avertical path including larger scale of the circuit closer in the closed the roller and adapted by contact with position. said roller to remove the bent linger 20 vfrom Fig. 4 is a similar view showing the c'irlocking position. The `character 29 desig-v 80 25 cuit closer open. nates an electro-magnet having a movable Fig. 5 is a combined elevation and seccore or armature 30 normally held down by tion showing the apparatus employed on a coil spring 31 around a pin 32 connected the car Jfor operating the circuit closer and with the lower end of the core and extenddoor latch locking device. ing through a head 33 on the lower end oi S5 The. circuit closer shown in connection the electro-magnet 29. The upper end o with the present invention is a modification the armature has connected with 'it a pin 34 of the device shown in my Letters Patent oi' and coupled to the latter is Vone end of a the United States issued May 8, 1923, No. lever 35 ulrumed on a bracket 36. The 1,454,095 and Jfor a full description of that other end of the lever 35 is connected by 90 device reference is made to saidLetters Patmeans of a rod 37 with `one arm of a bell ent. Briefly said device comprises a box 5 crank lever 38 Julcrumed at 38a the other rovided with contacts or electrodes 16 to end oi said bell crank lever being connected which the wires 24 of the elevator operating to the cam or shoe 26 by link 39. circuit areconnected and a cover 8 carrying The electro-magnet referred to is includedk 95 40 a circuit closer consisting oli a strip oi metal in the operating circuit 24 so as to be ener- 13 adapted to be impinged upon the two gized when the car is raised or lowered the electrodes 16 when the cover is closed by the door being closed. Y Hence when the car is operation of the upwardly Vpressed spring being so raised'or lowered the cam or shoe actuated door latch bolt 19. ln the present is out o .line to operate the roller 25. vXhen 100 invention the cover 8 is provided with a the curr-ent is broken, as when the controller p' latch hook or stop 8fL pointing toward the is moved to-stop the car, thecam or shoe is door latch bolt the end of said hook whenl moved into position to actuate the arrn40 1 the cover is closed adapted to engage the and hencerelease the latch of the cover 8, notch 19a in the upper end of Vthe bolt to thus permitting breaking of the circuit at 105 prevent the withdrawal oi the latch bolt the circu`t closer box when the door is when the cover is closed and locked as shown opened said breaking 'ot the circuit being in in Fig. 3.. Itis desirable that there be a additionl to the breakingk eected by the 1 latch bolt in the plane of its closing moveoperating circuit cannot, theretore,be closed 110 55 ment when confined 1n latching position as .until the door is fully reclosed. Nor'can the shown 1n Figs.'1 and 3. door be opened until the car 1s opposite 1t.

Y same as in my i tion to operate Because the operatingcircuit is effective on'v the electro-magnet when the'car passesa Hoor the vcam or-shoe 26 is held out of posithe lockv Anger 20. The e circuit closer Aboit is the former patent referred to In the present construction the 9 is normally-locked from the cover 8 is released by operation of t it e arrivaland stopping ofthe car opposite Y circuit` having included in the power course,` that the e gist of the incover, a manually operated rectilinearly moving spring'actuated door latch bolt carried bythe car and adapted to engage said case when the door is closed, a circuit closer carried Vby thecov'er, said Vcover actuated by any circuit used Y can be changed lmove said cam out the door latch bolt to close the circuit and ho d t e same closed, said coveralso havin a latch cooperating with the latch bolt to ,latch said bolt, means to latch means on the car controlled by the power circuit for releasing the last named latch vhen the car arrives and is stopped at the oor. Y

2. Apparatus foran electrically operated elevator including, In combination, a power the same closed, Vsaid cover also having a latch cooperating with the latch bolt to latch said bolt7 means to latch the cover,` means ony the car andlmeans consisting of a cam and an electro-magneti actuated by the power circuit forkreleasing thelast named door, said electro-magnet lastnamed latch.

WILLIAMY A; wILLIAiIIsV Y the cover,

car arrives and is stoppedl at the 

